초록 ▼

A receiving apparatus in a spread spectrum system includes a quadrature-demodulating section for demodulating a received signal in accordance with a clock signal to generate first and second quadrature components of an information signal and first and second quadrature components of a pilot signal a

A receiving apparatus in a spread spectrum system includes a quadrature-demodulating section for demodulating a received signal in accordance with a clock signal to generate first and second quadrature components of an information signal and first and second quadrature components of a pilot signal and a spreading code generating section for generating a spreading code sequence which is the same as used on a transmission side, for each of the information signal first and second quadrature components and pilot signal first and second quadrature components in response to the clock signal. A despreading section despreads each of the information signal first and second quadrature components and pilot signal first and second quadrature components by use of the corresponding generated spreading code sequence. A clock signal generating section generates the clock signal in accordance with a frequency control signal to supply the clock signal to the quadrature-demodulating section and the spreading code generating section. A frequency control signal generating section generates the frequency control signal from the despread pilot signal first and second quadrature components.

대표청구항 ▼

[ What is claimed is:] [1.] A receiving apparatus in a spread spectrum system, comprising:quadrature-demodulating means for demodulating a received signal in accordance with a clock signal to generate first and second quadrature components of an information signal and first and second quadrature com

[ What is claimed is:] [1.] A receiving apparatus in a spread spectrum system, comprising:quadrature-demodulating means for demodulating a received signal in accordance with a clock signal to generate first and second quadrature components of an information signal and first and second quadrature components of a pilot signal;spreading code generating means for generating a spreading code sequence which is the same as used on a transmission side, for each of said information signal first and second quadrature components and pilot signal first and second quadrature components in response to said clock signal;despreading means for despreading each of said information signal first and second quadrature components by use of the corresponding generated spreading code sequence;frequency control signal generating means for generating a frequency control signal from said despread pilot signal first and second quadrature components, said control signal generating means including means for controlling said clock signal generating means such thatEQU R(t)*R(t+.DELTA.t){ sin(.theta.(t)-.theta.(t+.DELTA.t)} set to zero, where R(t) and .theta.(t) are an amplitude and angle of a signal obtained by synthesizing said despread pilot signal first and second quadrature components at a time t, and R(t+.DELTA.t) and .theta.(t+.DELTA.t) are an amplitude and angle of a signal obtained by synthesizing said despread pilot signal first and second quadrature components at a time (t+.DELTA.t); andclock signal generating means for generating said clock signal in accordance with said frequency control signal to supply said clock signal to said quadrature-demodulating means and said spreading code generating means.